A little background. Historically ob1 always registered the entire memory
region when the RGET protocol was in use. This changed when Mellanox
added support to fragment RGET using the btl_prepare_dst function. Now
that the BTL layer has changed to split out the limits of get/put there
is explicit fragmentation code in ob1. Before this commit the registration
was still done per RGET fragment.
This commit will attempt to register the entire region before creating
RGET fragments. If the registration is successfull then all RGET
fragments will use this registration otherwise they will each attempt
to register their own segment of the receive buffer. If that fails
enough times each fragment will give up and fall back on send/recv.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
With certain datatypes the opal_datatype_unpack method for performing
the accumulate operation does not work. This commit modifies the
accumulate code in the osc base to use opal_convertor_raw instead.
Fixes#385
Squash compiler warnings now showing up in the
query methods for the mtls. Cast pointers to the different
mtl module specific types to the mca_base_module_t.
Also, fix up a missing extern in mtl_psm_types.h.
This was causing "multiple definition" errors when building
the mca_mtl_psm.so shared library.
Switch to using the query/priority method for selecting
MTLs. This switch was motivated by the fact that now
on some platforms, its possible for multiple MTLs to
be initializable, but only one MTL should be selected.
In addition, there is a complication with the PSM and
IFO (with PSM provider) MTLs owing to the fact that
they cannot both intialize the underlying PSM context,
i.e. only one call to psm_init is allowed per process.
The mxm component has not been compiled as the author
doesn't currently have access to a system with a recent
enough mxm installed to allow for a compile.
The portals4, ofi, and psm components have been checked
for compilation. The ofi and psm components have been
checked for runtime correctness on a intel/qlogic system
with up to date PSM installed.
http://www.open-mpi.org/community/lists/devel/2015/01/16820.php,
coll ML has two pending issues: a deadlock and a performance critical
on every communicator creation. After confirmation over IM from
Pasha, the ML collective module will be disabled until it is
fixed. Token to Pasha.
